Perhaps you should try some spelling variations:
thuoc sai » thuoc tai, thuoc san, thuoc sach
thanh lai » thanh hai, thanh lap, thanh loi
va thanh » gia thanh, ban thanh, va tinh
nang lao » nang cao, nang tao, nang dao
lao khoa » lo khoa, da khoa, ly khoa
phan dau » phan tu, hang dau
ve phan » va phan, ke phan, ve phat
lai cua » dai cua, hai cua, lai chau
toc sai » toc dai, toc thai, toc sach
hieu ve » hieu va, hieu van
dau va » dau ve, lau va
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((((toc sai) OR (thuoc sai))) or (toc san)) ky nang lao khoa. hieu ve phan dau va thanh lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((toc sai) OR (thuoc sai))) OR (toc san)) ky nang lao khoa. hieu ve phan dau va thanh lai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((toc sai) OR (thuoc sai))) or (toc san)) ky nang lao khoa. hieu ve phan dau va thanh lai cua te".
• Adding a wildcard symbol may retrieve word variants: ((((toc sai) OR (thuoc sai))) or (toc san)) ky nang lao khoa. hieu ve phan dau va thanh lai cua te*.