Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hoc sac » hoc cac, hoc mac, hoc sau
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
va dan » ca dan, va dao, va dau
tu van » tu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sac) or (hoc sach)) ky nang x ho. hieu ve cam tuc va dan ((vu van) OR (tu van)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sac) OR (hoc sach)) ky nang x ho. hieu ve cam tuc va dan ((vu van) OR (tu van)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sac) or (hoc sach)) ky nang x ho. hieu ve cam tuc va dan ((vu van) OR (tu van)) triet*".