Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
nam thuc » nam thuoc, am thuc, nam thu
cua tre » cua te, cuu tre, cua triet
cam tuc » cam xuc, cam tu, dam thuc
va hanh » van hanh, va thanh, va danh
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
hieu va » lieu va, hieu qua
te sac » te sach, te cac
ha hoi » hoa hoi, ha noi, xa hoi
te san » te ban, ke san, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sac) or (te san)) ky lang ha hoi. hieu va ((cam tuc) OR (nam thuc)) va hanh trinh cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te san)) ky lang ha hoi. hieu va ((cam tuc) OR (nam thuc)) va hanh trinh cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) or (te san)) ky lang ha hoi. hieu va ((cam tuc) OR (nam thuc)) va hanh trinh cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (te san)) ky lang ha hoi. hieu va ((cam tuc) OR (nam thuc)) va hanh trinh cua tre*.