Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hanh lai » hanh lam, hanh tai, thanh lap
chau tre » chay tren, chau tho, cho tre
vu sach » vu bach, su sach, vu khach
ly nang » ky nang, ly hang, ly vang
nang ho » nang hoc, nang co, tang ho
hieu ve » hieu va, hieu van
duc van » duc va, duc manh, duc phan
ho hoi » hoc hoi, hoa hoi, hoi hoi
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (thuoc sach)) ly nang ho hoi. hieu ve cam ((duc van) OR (duc tan)) hanh lai chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (thuoc sach)) ly nang ho hoi. hieu ve cam ((duc van) OR (duc tan)) hanh lai chau tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (thuoc sach)) ly nang ho hoi. hieu ve cam ((duc van) OR (duc tan)) hanh lai chau tre*".