Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
nganh ky » nganh y, nganh xay, hanh ky
vinh cuu » dinh cuu, sinh cua, dinh cu
hieu va » lieu va, hieu qua
truc va » thuc va, trung va
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
va cam » va cham, va cac, va cao
ha hoi » hoa hoi, ha noi, xa hoi
vi cuu » vi luu

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

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