Perhaps you should try some spelling variations:
kham luoc » khai luoc, kham cuoc, khac cuoc
thanh tai » thanh hai, thanh toan, doanh tai
hanh tai » hang tai, han tai, hinh tai
so sach » so sanh, bo sach, co sach
luoc va » nuoc va, duoc va, loc va
vu kham » vu khanh
sach ty » sach y, sach tu, sach thu
hieu vu » hieu va, hieu ve, hieu su
lang ha » long ha
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty ((nang ma) or (lang ha)) hoi. hieu vu kham luoc va ((hanh tai) OR (thanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty ((nang ma) OR (lang ha)) hoi. hieu vu kham luoc va ((hanh tai) OR (thanh tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty ((nang ma) or (lang ha)) hoi. hieu vu kham luoc va ((hanh tai) OR (thanh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach ty ((nang ma) or (lang ha)) hoi. hieu vu kham luoc va ((hanh tai) OR (thanh tai)) cua tre*.